Aspects of electron-electron correlations have for the past few decades been at the forefront of research in Solid State Physics. More traditional concepts under this topic have been phenomena such as superconductivity, ...

The efficiency of commercial polycrystalline silicon solar cells is currently 12% and 15% in the case of single crystalline cells. It is possible to lose about half of the open circuit voltage due to inferior contacts on ...

I-III-VI2 compound semiconductors are important photovoltaic (PV) materials with optical and electrical properties that can be tuned for optimum device performance. Recent studies indicated that the efficiencies (1) > 18%) ...

The reaction of direct current (DC) magnetron sputtered metallic CuIn and CuInGa alloys to a reactive H2Se/Ar/H2S gaseous atmosphere is an attractive industrial production process to produce Cu-based chalcopyrite absorber ...

Amorphous silicon is one of the most promising materials for large area solar cells for
terestrial photovoltaic applications. Unfortunately these cells suffer from two serious problems:
the efficiencies drop when laboratory ...

The two-step growth process, involving the selenization and sulfurization of sputter
deposited CuInGa alloys has been identified as a commercially viable method to produce
large area Cu(In1-xGax)(Se1-ySy)2 absorber films ...

Amorhous silicon is one of the most promising materials for large area solar cells for
terestrial photovoltaic applications. Unfortunately these cells suffer from two serious
problems: the efficiencies drop when laboratory ...

When a pure chromium single crystal is cooled through its Néel temperature, it undergoes a
paramagnetic to a multi-wave vector incommensurate spin-density-wave magnetic transition.
Should a chromium single crystal be ...

Impurity resonance scattering effects are investigated in the Cr-Ga alloy system. This
system has a triple point on its magnetic phase diagram where the paramagnetic (P),
incommensurate (I) and commensurate (C) ...

As environmental and energy resource concerns have increased, greater emphasis has been
placed on development of renewable energy resources such as photovoltaic electric
generators. CuInSe 2/ZnO heterojunction solar cells ...

The way we live has been fundamentally changed by technological innovations based on optical, electronic
and magnetic materials. Without the continuous increase of scienti c understanding on phenomena
that occur in ...

In this thesis the thermodynamic and magnetic properties of
the non-degenerate Hubbard model are investigated. The underlying
lattice is the bcc-lattice. The results obtained will
therefore be especially applicable to ...

Alloying Cr with non-magnetic Ru, results in unusual magnetoelastic effects due to strong
magnetic interactions with the lattice. In the low concentration region, Ru increases the Neél
temperature TN due to the enhancement ...